Toilet corrugation: types and installation rules

Gone are the days when heavy and clumsy cast iron pipes were used to connect plumbing to the sewer system. Today they are being replaced by lightweight, convenient and, what is also important, cheap plastic.

Using plastic corrugation, installing or replacing a toilet becomes accessible even to novice craftsmen. It is enough to have the necessary set of tools and strictly follow the recommended sequence of actions.

Types of corrugation

In essence, the corrugation is a wide and flexible sleeve with a cuff that drains waste from the toilet outlet to the sewer pipe. Such an adapter is manufactured industrially from a special thermoplastic that can be bent at any angle, stretched and compressed without loss of strength.

The standard product has the following dimensions:

length – 231-500 mm;
diameter at the end approaching the sewer riser – 110 mm;
the diameter on the side connected directly to the toilet outlet is 134 mm.

Modern industry offers consumers various types of corrugated pipes for connecting a household toilet:

Soft plastic corrugation. Due to its ease of installation and versatility, it is most popular.
Hard corrugation. More durable and reliable. Installation of such corrugation is somewhat more complicated.

According to the presence of reinforcing elements:

Unreinforced. Does not have additional elements in the design. Inexpensive, but also less durable.
Reinforced. Additional rigidity is given to the product by a thin wire running in a spiral along the walls of the corrugation. It has excellent reliability and durability, although it costs a little more.

In addition, the corrugation can vary in length. The length is always selected individually, depending on the location of the toilet.

Important rule! The length must be calculated with some margin. The corrugation should not connect the plumbing fixtures to the sewer pipe under tension. In this case, there will be a high risk of leaks.

Selection of quality products

A wide price range should not confuse the buyer when choosing the necessary plumbing elements. When choosing corrugation, you need to pay attention to the highest quality product. The cost of connecting plastic products for plumbing equipment is low. Having gained an insignificant amount on the price, the buyer risks purchasing a low-quality product, which will complicate the operation of the sanitary facility and reduce its time.

Note!
When choosing a manufacturer, you must take into account that domestic components for plumbing are inferior to foreign analogues.

The option of corrugation reinforced with metal wire should be preferred. A product with wire rings or mesh retains its strength longer. To ensure that the elastic partition does not sag or stretch excessively, you need to know the distance from the toilet outlet to the entrance to the sewer system. The durability of the product is also affected by the thickness and rigidity of the pipe walls. Understanding how to choose the right corrugation for a toilet bowl, the master will be able to choose the best products for repair.

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Pros and cons of corrugated pipes for toilets

The popularity of corrugation can easily be explained by its numerous advantages in comparison with other methods of connecting plumbing fixtures to the sewer system:

The most cost-effective installation method.
Simple installation technology that any homeowner can easily handle.
There is no need to use special tools.
An ideal option for temporary installation of a toilet, for example, during renovations in a bathroom.
A good solution for cases where the overall dimensions of the toilet outlet and the sewer outlet do not match.

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Despite its versatility, the use of corrugation is not always justified. This is primarily due to the low strength characteristics (especially of standard, soft and unreinforced varieties) of the plastic from which it is made. Besides:

Corrugated pipe is not intended for installation in thick walls and should be used exclusively in open areas.
At large rotation angles, the corrugation tends to form blockages.
Over time, extended sections of corrugated pipe will begin to sag under the influence of gravity.
When large waste, glass fragments or tiles pass through the corrugation, it runs the risk of being damaged and becoming unsuitable for further use.

Plastic toilet corrugation: about the advantages of the equipment

Among the main advantages are the following:

basic installation that can be carried out even by a novice plumber;
an ideal option for connecting a toilet to a riser when the sanitaryware needs to be moved from its original place;
the possibility of organizing a temporary toilet if restoration in an apartment or house is in an active stage and is still far from completion;
corrugation will help when there are problems with the sewer pipe and plumbing outlet;
relatively low cost (average 500 rubles);

The corrugation for the toilet costs about 500 rubles, it lasts about 15 years without replacement

light weight (200-500 grams);
if the floor height increases during the repair process, there is no need to replace the plastic tube with a new one.

Modern apartments and houses do not have a huge space for installing a toilet. Often such equipment is installed in a room with an area of less than 1 square meter. To arrange sanitaryware according to the design, corrugation is necessary. It allows you to place the unit on a pedestal and even “sink” it into the floor.

If plumbing needs to be moved from an old place to a new one, corrugation will again help. It will quickly connect the toilet to the riser pipe.

How to choose corrugation

Before you start buying a corrugated pipe for a toilet, you should clearly understand which product is best suited for our bathroom. It is imperative to check the diameters of the toilet outlet and sewer pipe. Most often these sizes are standard, but there are exceptions.

Another important point is the length of the corrugation. If the toilet is installed in close proximity to the sewer hole, the corrugation can be replaced with a special rubber cuff. And, on the contrary, for large combined bathrooms, you can consider the option of corrugation with an additional outlet, which will allow you to simultaneously connect not only the toilet, but also another element (bathtub, sink, etc.) to the drain.

It is not recommended to save on purchasing corrugated pipes. Even the most expensive products from leading imported manufacturers will not create a serious gap in the construction budget, but they can last much longer. In addition, the risk of receiving a low-quality fake in this case will be much lower.

Features of using a corrugated adapter

The cuff or corrugation for the toilet is not used to connect to the sewer in all cases. The fact is that plastic pipelines are more reliable and can last much longer.

But in some cases it is impossible to do without a corrugated adapter. For example, if the toilet cannot be mounted directly opposite the sewer outlet or when the floor level has risen higher after renovation. This happens when the old floor covering is not dismantled, but new tile material is laid on top of it.

Sometimes the location of the toilet is changed due to the rearrangement of plumbing equipment, if it is necessary to install, for example, a shower stall. Corrugation is used when the type of outlet of the mounted device does not correspond to the existing sewage system.

People living in Soviet-built houses often face a similar problem. In them, old sewer networks are designed to connect to devices with an oblique outlet, while in modern toilets it is made straight.

Dismantling the old structure

If the corrugation is being installed on an already installed toilet, the previous connection of which has become unusable or is no longer suitable for the owner, you will first have to dismantle it:

Before starting work, shut off the water supply and completely drain the water from the toilet tank.
First of all, we disconnect the edge of the structure that is attached to the toilet. This will make it easy to drain the remaining liquid from the pipe into the sewer.
If the old corrugation was fixed in the most compressed state, you may need to move the toilet to disconnect it. Most often, the toilet is attached to the floor with bolts that will need to be unscrewed.
If the toilet is fixed to the floor with cement, dismantling it can cause much more problems. Here, most likely, you won’t be able to do without a hammer and chisel. You must act extremely carefully so as not to damage the toilet itself or the sewer pipe. Replacing these elements will be much more expensive than replacing a corrugated pipe.
After disconnecting, it is necessary to thoroughly clean the toilet outlet (elements of the old structure, traces of sealant, cement, organic matter may remain here) and the sewer hole.

Note! As soon as the sewer bell is freed and cleaned of the remnants of the old structure, it is recommended to plug it with a thick fabric plug or a special plug. This will help avoid the spread of unpleasant sewer odors throughout the apartment.

Why does the leak occur?

This happens especially often when purchasing cheap equipment. Corrugation of dubious quality does not fit tightly enough to the pipe (its inner surface), and unwanted folds form on it. The appearance of a leak in this case is a matter of time.

Also, in some low-quality types of corrugated pipes, the skirt on the cuff is not straight, but cone-shaped. This shouldn't happen. More expensive models, especially those manufactured by leading companies in the market, have better quality and durability.

To carry out quality repairs, it is advisable to seek help from specialists. At the same time, you should not leave plumbers without attention; it is better to monitor what they are doing.

Corrugated pipe installation

After dismantling the old connecting element, it is necessary to carefully inspect the new corrugation again for possible damage. In addition, you should once again make sure that the length of the product will be suitable.

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If the corrugated pipe is installed simultaneously with a new toilet, it will be more convenient to carry out installation in the following order:

The corrugation is securely attached to the toilet outlet.
The toilet is attached to the floor.
Next, the structure is connected to the sewer system.

Despite the fact that the corrugation is attached to the standard outlet hole quite tightly and reliably, before installing it, it is advisable to treat the edge of the outlet with a special sanitary sealant. Such compositions based on silicone or acrylic are designed to work in conditions of constant high humidity, and their expansion upon drying will ensure the proper level of tightness.

Note! The corrugated pipe should be placed evenly and cover the outlet by 5-6 cm.

After this, the toilet with the corrugated pipe should be left until the sealant has completely dried (recommended periods are usually indicated in the instructions for the composition and may vary from one manufacturer to another).

Next, the toilet is installed in a permanent place, secured, and the free end of the corrugation is connected to the sewer pipe. The installation procedure is the same.

Flexible ribbed membranes at its end are responsible for reliable contact of the corrugated pipe with the inner surface of the drain.

When installed correctly, the contact is actually so strong that some craftsmen prefer to forego the use of sealants. Experience shows that such a solution reduces the service life of the corrugation and over time leads to the formation of leaks at the connection point.

Upon completion of all stages of work, the new design should be subjected to final tests. Water is supplied to the toilet and 2-3 flush cycles are carried out sequentially. The corrugated pipe and joints are carefully examined for leaks.

Single drops of water that appear will not require reworking the entire system; the problem area will simply need to be treated with sealant again.

Important details:

If you are planning to repair your plumbing yourself, purchase sealant, a measuring tape, and a chisel from the store. They will be useful to you in future plumbing work.
When installing, do not allow the corrugation to stretch too much. Subsequently, it will sag and a “pocket” will form. Water and waste will accumulate in it, which will soon lead to a violation of the tightness of the bottom of the pipe.
Don't skimp on using sealant. But remember that its use is only advisable on internal surfaces. Coating the outside of joints with sealant is useless, even if you apply a lot of it.

Follow the rules and instructions on how to install corrugation on a toilet, and the repair work will be completed perfectly!

How can I replace corrugation?

Despite the numerous advantages of corrugation, not all owners choose such an element. Some are confused by the fragility of the ribbed plastic, others are not satisfied with the appearance of the finished structure.

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Fortunately, there are alternative options that will serve just as well. This could be a bright chrome pipe, which will definitely win in appearance.

A toilet with an oblique outlet type is conveniently connected to the sewer system using a piece of PVC or polyethylene pipe. To seal the joints, rubber cuffs of the appropriate diameter will be required. Also, the pipe can be preheated, which will make the material more pliable and facilitate the installation procedure.